## Tagged Questions

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### Sperner’s lemma and Tucker’s lemma

In their article "A Borsuk-Ulam Equivalent that Directly Implies Sperner's Lemma" (American Mathematical Monthly, April 2013), Nyman and Su write "[W]e are unaware of a direct proo …
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### Why is it that Wikipedia has no coverage of Quantum stochastic calculus [closed]

Why is there no coverage in wikipedia on Quantum stochastic calculus. The biographies of mathematicians like KR Parthasarathy, Robin Lyth Hudson, VP Belavkin, and others. Is it no …
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### Langlands product

In his 'Märchen' Langlands considers for a local field $F$ a certain abelian category $\Pi(F)$ whose objects are given by isomorphisms classes of irreducible admissible representat …
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### Why do rigid spaces have “not enough points”?

In Brian Conrad's notes here for the 2007 Arizona winter school, bottom of p18, he says that there is an affinoid rigid-analytic space and a sheaf of abelian groups on it equipped …
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### Smallest containing simplex

Let $V_n$ be the least real number such that for every convex subset of $\mathbb{R}^n$ with hypervolume $1$ there is a containing simplex with hypervolume $V_n$. What is known abou …
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### 8 queens puzzle

In the 8 queen puzzle, if we use the incremental approach, i.e. put the queen one by one on the board, the number of possible sequences would be 2057. How is that number calculated …
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### Chern Character of a Symmetric Power

Simple question: I was trying to find a formula for the Chern character $ch(S^mE)$ in terms of $ch(E)$ but couldn't find a reference too easily. It can be worked out using symmetri …
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### General Orthogonal Group and its properties

I know that exist a Lie Group Called the Orthogonal Group $O(n)$. That correspond to all matrix of $n \times n$ in the real numbers such that the columns are a orthogonal basis for …
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### Taylor’s series for Lie groups

Let $G_1$ and $G_2$ be two (matrix) Lie groups, with $L(G_1)$ and $L(G_2)$ their respective Lie algebras. I am interested to know if there is a well developed theory to approximat …
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### enumerative Gromov-Witten invariants

Assume that $\mathcal{M}_{g,n}(X,A)$ is irreducible and of the expected dimension. Are the corresponding primary [i.e. no $\psi$ classes] Gromov-Witten invariants enumerative? How …